<?php

// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * This file keeps track of upgrades to the settings block
 *
 * Sometimes, changes between versions involve alterations to database structures
 * and other major things that may break installations.
 *
 * The upgrade function in this file will attempt to perform all the necessary
 * actions to upgrade your older installation to the current version.
 *
 * If there's something it cannot do itself, it will tell you what you need to do.
 *
 * The commands in here will all be database-neutral, using the methods of
 * database_manager class
 *
 * Please do not forget to use upgrade_set_timeout()
 * before any action that may take longer time to finish.
 *
 * @since 2.0
 * @package blocks
 * @copyright 2009 Sam Hemelryk
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

/**
 * As of the implementation of this block and the general navigation code
 * in Moodle 2.0 the body of immediate upgrade work for this block and
 * settings is done in core upgrade {@see lib/db/upgrade.php}
 *
 * There were several reasons that they were put there and not here, both becuase
 * the process for the two blocks was very similar and because the upgrade process
 * was complex due to us wanting to remvoe the outmoded blocks that this
 * block was going to replace.
 *
 * @global moodle_database $DB
 * @param int $oldversion
 * @param object $block
 */
function xmldb_block_myguestbook_upgrade($oldversion, $block) {
    global $DB, $plugin;
    $dbman = $DB->get_manager();
    
    if ($oldversion < 2014100226) {

        // объявление таблиц, которые будут созданы
        $table_messages = new xmldb_table('block_gb_messages');
        $table_comments = new xmldb_table('block_gb_comments');

//====================================="Таблица gb_messages"===================
        // добавление полей
        $table_messages->add_field('id', XMLDB_TYPE_INTEGER, '11', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null);
        $table_messages->add_field('name', XMLDB_TYPE_TEXT, '50', null, XMLDB_NOTNULL, null, null);
        $table_messages->add_field('message', XMLDB_TYPE_TEXT, null, null, XMLDB_NOTNULL, null, null);
        $table_messages->add_field('time', XMLDB_TYPE_INTEGER, '11', null, XMLDB_NOTNULL, null, null);

        
        // добавление ключа
        $table_messages->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));

//====================================="Таблица gb_comments"===================
        // добавление полей в таблицу gb_comments
        
        $table_comments->add_field('id', XMLDB_TYPE_INTEGER, '11', null, XMLDB_NOTNULL, XMLDB_SEQUENCE, null); 
        $table_comments->add_field('name', XMLDB_TYPE_TEXT, '50', null, XMLDB_NOTNULL, null, null);
        $table_comments->add_field('message', XMLDB_TYPE_TEXT, null, null, XMLDB_NOTNULL, null, null);
        $table_comments->add_field('messageid', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, null);
        $table_comments->add_field('time', XMLDB_TYPE_INTEGER, '11', null, null, XMLDB_NOTNULL, null);
        
        // Добавление ключа
        $table_comments->add_key('primary', XMLDB_KEY_PRIMARY, array('id'));

        // Добавление индекса 
        // $table_comments->add_index('messageid', XMLDB_INDEX_NOTUNIQUE, array('messageid'));
        
        // Создать таблицы в случае отсутствия оных 
        if (!$dbman->table_exists($table_messages)) {
            $dbman->create_table($table_messages);
        }
        
        if (!$dbman->table_exists($table_comments)) {
            $dbman->create_table($table_comments); 
        }

        // myguestbook's savepoint reached
        upgrade_block_savepoint(true, 2014100226, 'myguestbook');
    }
    return true;
}